Research On Micro-lecture Design Of Number And Algebra Concepts In Junior High School Based On APOS Theory

In the traditional teaching of mathematical concepts,teachers mainly teach knowledge guided by their own teaching experience,instead of students’ feelings about learning,and lack the guidance of scientific theory in the teaching process,which leads to students’ failure to achieve good learning results.With the increasing development of IT,the hotspots of education reform such as Internet +,education informatization and education digitization have brought new vitality to the teaching of mathematical concepts,and the rise of micro-lecture has also provided opportunities for the information teaching of mathematical concepts.Considering the above background,the author studies and generalizes the current situation of APOS theory,micro-lecture and mathematical concept teaching,and further clarifies the significance of the research.According to APOS theory,the author divides the teaching process of mathematical concepts into action stage,process stage,object stage and schema stage.The author designs micro-lectures with the main content of "Addition and Subtraction of Integral Form",and carries out three teaching experiments in two classes.The author adopts micro-lecture to teach in the experimental class,while in the control class,the author adopts the conventional teaching method.In order to check the effectiveness of the micro-lectures in various aspects,the author conducts questionnaire survey and tests on students at the end of three lessons.The results indicate that there are noteworthy differences between the two classes,and the experimental class is obviously better than another.Moreover,the micro-lectures have a constructive impact on students’ understanding of mathematics concepts,problem-solving,and emotional attitudes.The author also interviews the teachers,and the teachers show their acceptance of the micro-lecture and their willingness to use micro-lecture in future teaching without exception.From these,it is concluded that the micro-lecture of number and algebra concepts in junior high school based on APOS theory is constructive to promote students’ learning of mathematical concepts.Finally,based on the APOS theory,the author proposes specific suggestions for the design of micro-lecture on the concepts of numbers and algebra in junior high school,and designs micro-lecture segments combined with lesson examples.